Counterweighted sidewalk elevator



May 10,1927. l 1,628,556 A. J. ROSELL COUNTERWEIGHTE-D SIDEWALK ELEVATOR ay 7 A. J. RosELL 1628556' COUNTERWEIGHTED S IDEWALK ELEVATOR 1 ATTORNEYS Patented Mey 10, 1927.

narran sraras .AXEL J'. ROSELL, OF BROOKLYN, NEW YORK.

COUNTEBVEVGH'I'El)il SIDEW'ALK ELEVATOR.

Application led .Tune 17',

The present invention is concerned with the provision of a. counterweighted side walk elevator' of the type commonly employed for hoisting ashes or transferring merchandise from Vthe( side walk to the basement.

An object of the invention is to provide a counterweighted elevator of this character so constructedthat there is no danger of the elevator moving in-any direction unless the operator. is turning the handle. Mea-ns are providedfor automatically locking the ele- Lvator against accidental movement, yeven though the counterweight be considerably heavier than the load on the platform, and even though the load on the platform predominates over the counterweight. In other words, torque on the operating shaft produced by the counterweight or the load on the platform, will simply serve to lock the device against operation, and movement of the elevator up and down in its shaftway can be accomplished only Vwhen the operating sha-ft is manuallyturncd with suiicient force to overcome the weight difference vbetween the load on the platform and the counterweight, regardless of which weight predominates.

A further object of the invention is to provide a counterweighted side walk elevator in which all of the operating` mechanism is mounted on, or carried by the platform. rlhis construction renders the operating mechanism-always readily accessible for purposes of cleaning 'or repair, and eliminates the conventional practice of mounting driving-wheels or kindred apparatus in the bottom of the shaftway.

Other objects of the invention are to provide a counterweighted side walk elevator, of simple, practical construction, which will be rugged, durable and efficient in use, absolutely fool-proof in operation, and which will lend itself to manufacture and installation with comparative economy.

lith the above noted and other objects in view, the invention consists in certain novel features of construction and combinations and arrangements of parts, as will be more fully hereinafter set forth and pointed out in the claims. The invention may be more fully understood from the following description in connection with the accompanying drawings, wherein- Fig. l is a view in vertical section through an elevator shaftway showing my improved 1926. Serial No. 116,666.

elevator in position therein. rlhis view .is taken on the line 1-1 of Fig. 2.

l `ig.2is another vertical sectional view at right angles to Fig. l, taken on the line 2-2 of Fig. l.

ln the drawings l have used the reference character l to designate a side walk, and ll an elevator shaftway sunk downwardly fromthe side walk and communicating near its lower end with an opening l2, which in accordance with conventional practice may represent. an entrance from the basement of a building. The shaftway extends 'lo a sufiicient distance between `the. basement floor to provide ample clearance for the mechanism hung under the platform ll of the elevator. f

Any suitable number of vertical guide rails l5 are mounted at the sides of the shaftway 1l, and serve to guide the vertical sliding movement of the platform lll. At tile back of the shaftway there is vertical partition member 16 spaced a slight Vdistance fromfthe rear wall 17 of theshaftway.

Partition lcooperates with a second short partition 18 to provide a compartment at the rear of the shaftway, in which the coun-` terweight 19 and its associated mechanism are accommodated. A

llepending from the platform let are a kpair of relatively wide hanger plates 20.

chain 26 to a sprocket wheel 27 mounted on a shaft 28 borne in a skeleton frame 29 supported on Vand rising from the platform 14.

Keyed to the same shaft as the sprocket wheel 27 is a relatively large gear 30 meshing with a pinion 3l on the driving shaft 32 of the elevator. This driving shaft carries a suitable operating crank handle 33, and on the driving shaft there is mounted a clutch of conventional construction designated generally by the reference character 34:. The purpose of the clutch will be more fully hereinafter set forth.

Each of the drums 23 and 24 has wound thereon a cable 35, the upper ends of these cables being anchored to suitable anchorages at 36 near the upper end of the shaftway. Thus, rotating the drums in a counter-clockllt) aise direction will tend to wind the cablea ilo, and more the eleiator from the posi tion illustrated, toward the top of the shaftway.

'Wound on the drum 28 in the opposite direction to the windinu of the cable 35 is a counterweinjht cable Si passed over a enit* able pulley 38 mounted on a bracket 55) at the upper end of the Shaftway, and then passed umler the pulley at) from which the counterweight lt) suspended by a hanger Ail. lt will bc seen that the eoimterweight tende` to rotate the drinne in a counter-clockwise direction and moves the elevator to Yard the top oit' the Shaftway.

In. order to keep slack out ol the cablesl 255 and 3T, a third cable lo is wound on 'the drum 22.3, run under a pulley lo in the bot tom of the ehaftway and connected through a coiled tensioning epring' Liti' to an anchored turnbuckle L18.

'lhe details` of construction of the clutch Si forni no part of the. preeent inveiuion. the clutch being,`- of a standard type and widelyY used in warioueI forms of machinery. The clutch ma)v be of the general character disclosed in the Powere Patent No. 1,558,042 ot October 20, 1925. The function of the clutch is to lock the shaft against rotation when torque ie imparted to this shaft b v the weight of the platform or the counterwei'ht. ln other worde. a` material difi ference in weight between the platform and co1mterweight are inoperative to elfeet movement of the elevator, since the clutch automatically locks the gear train against movement. lllhen however, the handle $33 is grasped and turned so that the load ia picked up by the handle instead of transimitted to the clutch, the gear train will be active to operate the drums 225 and 2l, and through the cables above described, move the platform either up or down on its guides l5.

lt is to be noted that all of the operating mechanism including; the drum shaft and drums are carried by the platform li, and the common incomfenience of mounting machinery in the bottom of the ehaftway is eliminated. Consequently, the operator ie always with the load on the platform. The need for the services of two men, one to operate the machinery in the basement, and the other to handle the loading; and unloading oit the elevator is obviated.

lhile the operation of the device will be readil)7 understood from the foregoing' description, it may be briefly noted that when the shaft 52 is rotated by the crank handle 33 in a clockwise direction, the drum shaft, will be rotated in a counter-cloekwise direction, winding,T the cables 35 and permittingl the cables 37 and to unwind an the platform moves toward the top of the ahaftway. then the driving; shaft 252 is turned in a coniiteicloekwise direction, the drum shaft will be rotated in a clockwise direction, winding' the counterweight 37 and the tenaioninggn cable l5 and permitting` the lifting: cables 35 to unwind as; the ear moves toward the lower end of the shaft.

Various changes and alterations might be made in the general form and arrangement of parte described without departing:r from the invention. Hence I do not wish to limit myeeelit to the details set forth, but :shall consider myself at liberty to make such changes4 and alterations as fairly fall within the spirit and scope of the appended claims.

l claim: t

l. ln a eide walk elevator', the combination with a shaftway, and platform guided for vertical sliding movement in the shaftway, of a drum Shaft hung from and journalled below the platform, drums on the ende of the shaft, lifting' cables wound on the drums and anchored near the top of the shaftway, a counterweight, a counter weight cable wound on one of the drums, a frame mounted on the platform, a train of drivingr gears supported by the frame and connected to the drum Shaft, and a teir eioning cable anchored in the bottom of the shaft and wound on one of the drums.

2. A device as set forth in claim l, and wherein an automatic clutch on the drive shaft pri-iventsthe weightof the platform or counterweight from turning the shaft.

AXEL J, ROSELL. 

